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  • 1
    Electronic Resource
    Electronic Resource
    The irreversibility behavior of NdBaCuO fabricated by top-seeded melt processing (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2981-2983 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Large, single grain NdBa2Cu3O7−δ (Nd123)–Nd4Ba2Cu2O10 (Nd422) composites have been fabricated up to 2 cm in diameter in a controlled 1% O2 in N2 atmosphere using a top-seeded melt growth technique. The irreversibility field as a function of temperature has been obtained from magnetic hysteresis loops for magnetic fields applied parallel and perpendicular to the c axis of small specimens ((approximate)2×2×3 mm3) cut from individual grains. These specimens are observed to exhibit a pronounced peak effect for current flowing in the a–b plane and a five-fold anisotropy in the irreversibility line over a wide temperature range for fields applied along the major crystallographic axes. An exceptionally high irreversibility field (〉12 T at 89 K) is observed in this material for field applied perpendicular to the c axis, which extrapolates to well over 40 T at 77 K. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125208
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  • 2
    Electronic Resource
    Electronic Resource
    Melt texturing of NdBa Cu O Nd Ba Cu O superconductor in short time (1998)
    Springer
    The European physical journal 4 (1998), S. 55-59 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 74.80.Bj Granular, melt-textured, and amorphous superconductors; powders - 74.25.Ha Magnetic properties - 74.60.Jg Critical currents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We have melt processed NdBa2Cu3O -Nd4Ba2Cu2O10 (NdBCO) superconducting composites with various rates of cooling through their peritectic formation temperature. The microstructural studies reveal that the sample processed even with C/h rate of cooling is built up with aligned microstructure which is necessary for superior transport current and magnetic properties. In the case of YBa2Cu3O , C/h rate of cooling is necessary to get highly textured microstructure. Magnetic flux profile measurements reveal that even though the intradomain region is well textured and had good transport and magnetic properties, the interdomain region is relatively weak in the fast cooled sample in comparison with slow cooled ones but is much better than that in polycrystalline samples. The results suggest that, the NdBCO superconductor can be melt processed in short time with much better microstructural features in comparison with YBCO system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050350
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    Paper (German National Licenses)
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